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2 years ago

Witch answer represents a speed, of velocity A-35m/s B-35 m/s south C- 35 m/s east -35 m/a down

Physics

1 answer:

sladkih [1.3K]2 years ago

3 0

Answer:

A 35 m/s

Explanation:

Speed of any object is scalar quantity while velocity is a vector. The scalar quantity is represented only by magnitude it doesn't need direction.

Hence, option A is correct as all other options have direction as well.

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If the mass of a 1.8 g paperclip was able to be completely converted to energy, how much energy would you obtain?

Anton [14]

Answer:

$E=1.62\times 10^{14}\ J$

Explanation:

Given that,

The mass of the paperclip, m = 1.8 g = 0.0018 kg

We need to find the energy obtained. The relation between mass and energy is given by :

$E=mc^2$

Where

c is the speed of light

So,

$E=0.0018\times (3\times 10^8)^2\\\\E=1.62\times 10^{14}\ J$

So, the energy obtained is $1.62\times 10^{14}\ J$ .

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2 years ago

True or false, the hardest working muscle in the body is the gluteus Maximus?

Mademuasel [1]

False. I’m pretty sure the heart is the strongest muscle ( ._.)

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2 years ago

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hram777 [196]

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3 years ago

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An astronomer at the equator measures the Doppler shift of sunlight at sunset. From this, she calculates that Earth's tangential

Ksivusya [100]

Answer : Radius of Earth is 6,340 Km.

Explanation

It is given that,

Tangential velocity of Earth at the equator, v = 465 m/s

Centripetal acceleration at the equation is, $a_c=3.41\times 10^{-2}\ m/s^2$

We know that the relation between centripetal acceleration and tangential velocity is :

$a_c=\dfrac{v^2}{r}$ ..........(1)

Where,

v is tangential velocity

r is the radius

Putting all values in equation (1)

$3.41\times 10^{-2}\ m/s^2=\dfrac{(465 m/s)^2}{r}$

$r=6340909\ m$

$r=6,340\ Km$

The Earth's radius is 6,340 Km. Hence, this is the required solution.

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2 years ago

What’s the velocity of a car traveling 144km in 90 minutes per hour

S_A_V [24]

Answer:

96 mph

Explanation:

There are a couple of ways of doing this, but I will just use a proportion.

first off 1 hour = 60 minutes.

So 144/90 = x/60 will give me the answer per 60 minutes of miles per hour.

cross multiply to get 90x = 8640

divide by 90 to get 96 miles per 60 minutes or 96 mph.

Hope this helped.

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2 years ago